BOSTON (AP) — Democratic U.S. Sen. Elizabeth Warren, among her party’s harshest critics of President Donald Trump, won re-election Tuesday in Massachusetts and wasted little time ripping into her nemesis.

In her victory speech, Warren said Trump practices “the dark art of ruling by fear — fear whipped up to turn hard-working Americans against other hard-working Americans.”

Warren was also quick to credit women with leading the resistance to Trump.

“Two years ago, on a very dark election night, millions of women watched in horror as Donald Trump was elected president,” Warren said. “They didn’t like it. But they didn’t whimper. They didn’t whine. They fought back.”

Warren has generated considerable speculation about a possible run for the White House in 2020, recently saying she’d take a “hard look” at a presidential bid after the Senate race was over.

With her win, supporters and critics alike will begin looking more closely for any signs from Warren about whether she intends to launch a campaign for president.

She gave no specifics about a future run Tuesday but returned to familiar themes during her speech, saying she and others came to the fight against Trump “on behalf of millions of Americans who are getting ripped off in a rigged economy and ignored by a corrupt government in Washington.”

The former Harvard Law School professor recently released a DNA test suggesting that a distant ancestor was Native American, an effort to rebut Trump’s frequent mockery of her claim to Native American heritage.

Diehl conceded just after 9 p.m.

“We fought hard for the last 18 months. We left no stone unturned,” Diehl said, talking to supporters gathered in his hometown of Whitman. “I know that I gave it my all.”

Tuesday morning Warren downplayed her clashes with Trump after voting near her home in Cambridge.

“For me this is about the people of the Commonwealth of Massachusetts,” Warren told reporters. “It’s about whether or not we’re able to protect health care, whether or not our students get a break or get crushed by student loan debt.”

The contest between the two was testy at times, with each candidate looking to score points with voters by chipping away at the other.

Warren said that Diehl would be a rubber stamp in Washington for Trump’s agenda even when it’s not in the interest of most Massachusetts residents.

Diehl argued Warren spent too much time traveling around the country to stump — and raise money — for fellow Democrats running for Congress. He said she should quit and run full time for the White House.

For fans of Warren, the campaign played out in part as a test run for a possible 2020 clash between Warren and Trump.

Trump taunts of “Pocahontas” directed at Warren in part prompted her decision to release the DNA test. Warren has said the decision to release the test results was also part of a wider effort on her part to be an open book.

“I put it all out there. Ten years of tax returns. All my employment records, And yeah, I even took a DNA test. It’s there. It’s on the internet. Anybody can take a look at it,” she told The Associated Press in a recent interview.

Although she points to some legislative successes under the Trump administration, Warren said her decision to campaign for Democrats in other states is part of a wider goal to help flip the Senate to make it easier for Democrats to push a more ambitious agenda in line with what she said are the goals of most Massachusetts voters.

Even though she was running against Diehl, the figure of Trump, who remains unpopular in Massachusetts where he garnered less than 34 percent of the 2016 vote, hung over the contest.

Asked about the worst thing Trump has done during his two years in office, Warren pointed to what she described as his embrace of authoritarian figures like Russian President Vladimir Putin or North Korea’s Kim Jong Un.